CN106244799A - A kind of sintering method improving sintering desulfuration rate - Google Patents
A kind of sintering method improving sintering desulfuration rate Download PDFInfo
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- CN106244799A CN106244799A CN201610786221.5A CN201610786221A CN106244799A CN 106244799 A CN106244799 A CN 106244799A CN 201610786221 A CN201610786221 A CN 201610786221A CN 106244799 A CN106244799 A CN 106244799A
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- sintering
- quick lime
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- anthracite
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
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Abstract
The present invention discloses a kind of sintering method improving sintering desulfuration rate, it is characterized in that, Iron Ore Powder, the fuel of certain proportioning and the flux containing quick lime that granularity is 2～10mm are mixed according to a certain ratio, form sintering feed, grate-layer material is layered on sintering machine, then by sintering feed uniform spreading on grate-layer material, described sintering feed thickness is 700～800mm, rearmost point burns knot, and firing temperature is 1000～1200 DEG C.Using described sintering method to be sintered, can improve sintering desulfuration rate, decrease coke usage amount and the cost of raw material breeze simultaneously, entirety saves resource, reduces production cost, brings obvious economic benefit for sintering plant.
Description
Technical field
The present invention relates to a kind of sintering method, be specifically related to a kind of sintering method improving sintering desulfuration rate.
Background technology
Iron and steel enterprise enters the 90% of Sulfur Dioxide In The Atmosphere from sintering plant, therefore, reduces the sulfur dioxide of sintering plant
Discharge is the most important thing of iron and steel enterprise's environmental improvement, and Expedite the application sintering desulfuration is that steel and iron industry environmental improvement is badly in need of solving
Major issue.
China's sintering flue gas desulfurization is started late, the sulfur removal technology of selection, and the engineering project of construction can not be fully effective
Ground is for the feature of sintering flue gas, and domestic sintering flue gas desulfurization successful story is not the most a lot, and referential similar projects is few.
It is low that the most a lot of sintering plants are faced with sintering process desulfuration efficiency always, and sintering deposit sulfur-bearing high phenomenon causes blast furnace
The problems such as sulphur analysis height, coke ratio rising, thereby result in whole sintering process fuel consumption high, the problem that sintering cost is high.
Summary of the invention
In view of this, the application provides a kind of sintering method that can be effectively improved sintering desulfuration rate, and the present invention improves
Desulfurization degree, has saved the energy, decreases the discharge of pollutant and reduces production cost and the fuel of whole sintering process
Consume.
For solving above technical problem, the technical scheme that the present invention provides is a kind of sintering method improving desulfurization degree, its
It is characterised by, by Iron Ore Powder that granularity is 2～10mm, the fuel of certain proportioning and the flux containing quick lime according to necessarily joining
Than mixing, form sintering feed, grate-layer material is layered on sintering machine, then by sintering feed uniform spreading on grate-layer material, described sintering
Material thickness is 700～800mm, and rearmost point burns knot, and firing temperature is 1000～1200 DEG C.
When use grate-layer material technique time, paving sintering feed before, first paving one layer of granularity be 10～25mm, thickness be 20～
The fritter sintering deposit of 25mm, as grate-layer material, its objective is to protect fire grate, reduces load of dust remove, extend the fan rotor life-span, subtract
Less or eliminate fire grate sizing.
After having spread bed material, carry out cloth therewith.Granularity and the chemical composition etc. of sintering feed are required along chassis in length and breadth during cloth
Direction is uniformly distributed, and has certain laxity, surfacing.
Undersized, the air capacity of suction is too small, and sample amount is not enough, it is impossible to takes away rapidly sulfide from sinter bed, leads
Cause desulfurization degree reduces, and when granularity is excessive, outside diffusion conditions is improved but diffusion inside is difficult, and desulfurization degree reduces, so working as
The Task-size Controlling of Iron Ore Powder can make desulfurization degree reach maximum 2～10mm.
Preferably, the fuel of described certain proportioning by the coke powder that mass fraction is 40% and mass fraction be 60% smokeless
Coal forms.
Preferably, in described anthracite each constituent mass percentage composition be fixed carbon >=69%, S≤1%, ash≤
20%, fugitive constituent≤10%.
Preferably, described anthracite granularity≤3mm for more than the 95% of total anthracite quality.
The solution of the present invention decreases the S content in fuel, reduces FeO FeS and form meltable eutectic and liquid phase increasing
The problems such as many, further desulfurization.
Preferably, the described flux containing quick lime is the mixture of quick lime, slaked lime, limestone and dolomite.
Quick lime be mainly composed of CaO, slaked lime be mainly composed of Ca (OH)2, being mainly composed of of limestone
CaCO3, dolomite be mainly composed of CaMg (CO3)2, sintering feed adds a certain amount of dolomite, makes sintering deposit contain suitable
When MgO, sintering process is had good effect, the quality of sintering deposit can be improved.The fineness ratio of dolomite is relatively thick, specific surface
Less, reduce the absorption of sulfur in gas, beneficially process desulfurization.
Preferably, in described flux, the prescription of quick lime is: CaO >=78% in quick lime, SiO2＜ 5%, described
Activity degree >=the 180mL of quick lime.
Preferably, described quick lime granularity ＜ 3mm for more than the 95% of total Lime Quality.
Preferably, in described dolomite, the quality of MgO is 3.8% the 4.2% of described mixture gross mass.
Compared with prior art, its detailed description is as follows for the application:
The present invention, by controlling quality and the proportioning of Iron Ore Powder, fuel and flux in sintering process, optimizes burning
Knot technique, makes sintering desulfuration rate be significantly improved, and decreases coke usage amount and the cost of raw material breeze simultaneously, overall
Save resource, reduce production cost, bring obvious economic benefit for sintering plant.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that technical scheme, below in conjunction with specific embodiment pair
The present invention is described in further detail.
The invention provides a kind of sintering method being effectively improved desulfuration efficiency, by Iron Ore Powder that granularity is 2～10mm, account for
Total coke powder of fuel mass 40% and the anthracite of 60% and melting containing quick lime, slaked lime, limestone and dolomite
Agent mixes according to a certain ratio, adds suitable quantity of water pelletizing, forms sintering feed, and first one layer of granularity of paving is 10～25mm, and thickness is 20
～the fritter sintering deposit of 25mm is as grate-layer material, grate-layer material is layered on sintering machine, then by sintering feed uniform spreading grate-layer material it
On, require during cloth that the granularity of sintering feed and chemical composition etc. are uniformly distributed along chassis direction in length and breadth, and have certain loose
Property, surfacing.Described sintering feed thickness is 700～800mm, and rearmost point burns knot, and firing temperature is 1000～1200 DEG C.
Wherein, in fuel, anthracite selects each constituent mass percentage composition to be fixed carbon >=69%, S≤1%, ash
≤ 20%, the high-quality anthracite of fugitive constituent≤10%, and described anthracite granularity≤3mm for the 95% of total anthracite quality
Above.
In flux, the prescription of the quick lime of selection is: CaO >=78% in quick lime, SiO2＜ 5%, described life
Activity degree >=the 180mL of Calx, and in all quick lime the quick lime of granularity ＜ 3mm account for the 95% of total Lime Quality with
On.The requirement of dolomite selected is that in dolomite, the quality of MgO is 3.8% the 4.2% of described sintering feed gross mass.
Embodiment 1
A kind of sintering method improving sintering desulfuration rate and reducing burnup, including dispensing, pelletizing, stone, sintering four
Individual step；
(1) dispensing: raw material be granularity be the sefstromite powder of 2～10mm, wherein granularity is the sefstromite powder of 2～5mm
Weight is total Iron Ore Powder weight 75%；
Fuel is coke powder and anthracitic mixture, and wherein the gross weight of coke powder is the 40% of fuel gross weight, anthracite
Gross weight is fuel gross weight 60%, wherein anthracite select each constituent mass percentage composition be fixed carbon >=69%, S≤
1%, the high-quality anthracite of ash≤20%, fugitive constituent≤10%, and anthracite granularity≤3mm for total anthracite quality
98%.
Flux is the mixture of quick lime, slaked lime, limestone and dolomite, the prescription of the quick lime of selection
For: CaO >=78% in quick lime, SiO2 ＜ 5%, the activity degree >=180mL of described quick lime, and grain in all quick lime
The quick lime of degree ＜ 3mm accounts for the 98% of total Lime Quality.The quality of the middle MgO of the dolomite selected is the total matter of described sintering feed
The 4.2% of amount.
(2) mixed pelletizing: sintering feed is added water, then mix homogeneously, incorporation time is 2min, carries out in mixed process
Pelletizing.
(3) stone: before cloth compound, first one layer of granularity of paving is 10～25mm, and thickness is the fritter sintering deposit of 20mm
As grate-layer material, its objective is to protect fire grate, reduce load of dust remove, extend the fan rotor life-span, fire grate sizing is reduced or eliminated.
After having spread bed material, carry out cloth therewith.Require during cloth that granularity and the chemical composition etc. of compound are uniform along chassis direction in length and breadth
Distribution, and have certain laxity, surfacing.Then being layered on equably on bed material by sintering feed, layer thickness is
700mm。
(4) igniting sintering: being lighted on bed of material surface, firing temperature is 1200 DEG C, and the duration of ignition is 60s, igniting is true
Reciprocal of duty cycle 6kPa, the igniting degree of depth is 15mm, is sintered subsequently.
Being sintered according to the method described above, sintering desulfuration rate improves 5%, according to current blast furnace feeding sintering deposit proportioning meter
Calculating, reduce coke consumption 0.67Kg/ ton ferrum, bring benefits 1.34 yuan/ton of ferrum, then brings benefits producing per month in terms of 110,000 tons of ferrum
14.74 ten thousand yuan/month.Entirety saves resource, reduces production cost, brings obvious economic benefit for sintering plant.
Embodiment 2
A kind of sintering method improving sintering desulfuration rate and reducing burnup, including dispensing, pelletizing, stone, sintering four
Individual step；
(1) dispensing: raw material be granularity be the sefstromite powder of 2～10mm, wherein granularity is the sefstromite powder of 2～5mm
Weight is total Iron Ore Powder weight 75%；
Fuel is coke powder and anthracitic mixture, and wherein the gross weight of coke powder is the 40% of fuel gross weight, anthracite
Gross weight is fuel gross weight 60%, wherein anthracite select each constituent mass percentage composition be fixed carbon >=69%, S≤
1%, the high-quality anthracite of ash≤20%, fugitive constituent≤10%, and anthracite granularity≤3mm for total anthracite quality
95%.
Flux is the mixture of quick lime, slaked lime, limestone and dolomite, the prescription of the quick lime of selection
For: CaO >=78% in quick lime, SiO2 ＜ 5%, the activity degree >=180mL of described quick lime, and grain in all quick lime
The quick lime of degree ＜ 3mm accounts for the 96% of total Lime Quality.The quality of the middle MgO of the dolomite selected is the total matter of described sintering feed
The 3.8% of amount.
(2) mixed pelletizing: sintering feed is added water, then mix homogeneously, incorporation time is 2min, carries out in mixed process
Pelletizing.
(3) stone: before cloth compound, first one layer of granularity of paving is 10～25mm, and thickness is the fritter sintering deposit of 25mm
As grate-layer material, its objective is to protect fire grate, reduce load of dust remove, extend the fan rotor life-span, fire grate sizing is reduced or eliminated.
After having spread bed material, carry out cloth therewith.Require during cloth that granularity and the chemical composition etc. of compound are uniform along chassis direction in length and breadth
Distribution, and have certain laxity, surfacing.Then being layered on equably on bed material by sintering feed, layer thickness is
800mm。
(4) igniting sintering: being lighted on bed of material surface, firing temperature is 1000 DEG C, and the duration of ignition is 50s, igniting is true
Reciprocal of duty cycle 6kPa, the igniting degree of depth is 20mm, is sintered subsequently.
Being sintered according to the method described above, sintering desulfuration rate improves 6%, according to current blast furnace feeding sintering deposit proportioning meter
Calculating, reduce coke consumption 0.67Kg/ ton ferrum, bring benefits 1.34 yuan/ton of ferrum, then brings benefits producing per month in terms of 110,000 tons of ferrum
14.74 ten thousand yuan/month.Entirety saves resource, reduces production cost, brings obvious economic benefit for sintering plant.
Below it is only the preferred embodiment of the present invention, it is noted that it is right that above-mentioned preferred implementation is not construed as
The restriction of the present invention, protection scope of the present invention should be as the criterion with claim limited range.For the art
For those of ordinary skill, without departing from the spirit and scope of the present invention, it is also possible to make some improvements and modifications, these change
Enter and retouch and also should be regarded as protection scope of the present invention.
Claims (8)
1. the sintering method improving sintering desulfuration rate, it is characterised in that by Iron Ore Powder that granularity is 2～10mm, necessarily join
The fuel of ratio and the flux containing quick lime mix according to a certain ratio, form sintering feed, grate-layer material are layered on sintering machine,
Again by sintering feed uniform spreading on grate-layer material, described sintering feed thickness is 700～800mm, and rearmost point burns knot, firing temperature
It it is 1000～1200 DEG C.
Sintering method the most according to claim 1, it is characterised in that the fuel of described certain proportioning by mass fraction is
The coke powder of 40% and mass fraction are the anthracite composition of 60%.
Sintering method the most according to claim 2, it is characterised in that in described anthracite, each constituent mass percentage composition is
Fixed carbon >=69%, S≤1%, ash≤20%, fugitive constituent≤10%.
Sintering method the most according to claim 3, it is characterised in that in described anthracite, the part of granularity≤3mm accounts for always
More than the 95% of anthracite weight.
Sintering method the most according to claim 1, it is characterised in that the described flux containing quick lime is quick lime, disappears
The mixture of Calx, limestone and dolomite.
Sintering method the most according to claim 5, it is characterised in that in described flux, the prescription of quick lime is: raw
CaO >=78% in Calx, SiO2＜ 5%, the activity degree >=180mL of described quick lime.
Sintering method the most according to claim 5, it is characterised in that described quick lime granularity ＜ 3mm for total quick lime
More than the 95% of weight.
Sintering method the most according to claim 5, it is characterised in that in described dolomite, the quality of MgO is described mixing
3.8% the 4.2% of thing gross mass.
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|---|---|---|---|
| CN201610786221.5A CN106244799A (en) | 2016-08-31 | 2016-08-31 | A kind of sintering method improving sintering desulfuration rate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107641709A (en) * | 2017-09-30 | 2018-01-30 | 四川德胜集团钒钛有限公司 | A kind of sintering method for reducing burnup |
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| KR100321041B1 (en) * | 1997-12-11 | 2002-03-08 | 이구택 | A method for mixing iron ore containing high alumina for better sintering |
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| CN104232884A (en) * | 2013-06-24 | 2014-12-24 | 凌敬平 | Agglomeration method of iron ore powder |
| CN104480299A (en) * | 2015-01-14 | 2015-04-01 | 东北大学 | Method for preparing sintered ores by adding waste slag to chromium-containing-type vanadium-titanium magnetite concentrates |
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|---|---|---|---|---|
| KR100321041B1 (en) * | 1997-12-11 | 2002-03-08 | 이구택 | A method for mixing iron ore containing high alumina for better sintering |
| CN1962897A (en) * | 2006-11-30 | 2007-05-16 | 武汉钢铁(集团)公司 | Sintered ore capable of improving viscosity of blast furnace slag and process for preparing same |
| CN104232884A (en) * | 2013-06-24 | 2014-12-24 | 凌敬平 | Agglomeration method of iron ore powder |
| CN104561530A (en) * | 2014-12-26 | 2015-04-29 | 河北钢铁股份有限公司承德分公司 | Medium-titanium high-strength sintered ore and preparation method thereof |
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Cited By (1)
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| CN107641709A (en) * | 2017-09-30 | 2018-01-30 | 四川德胜集团钒钛有限公司 | A kind of sintering method for reducing burnup |
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